UN diplomats explain exactly why they were laughing at -- and not with -- Trump
President Donald Trump addresses the UN/Screenshot

A day after Donald Trump's boasting garnered laughter at the United Nations, diplomats explained exactly why they were laughing at -- and not with -- the US president.

"Sometimes, when we see a behavior or listen to arguments or notions that seem so far-fetched, unreasonable, or insane, there is almost natural reaction of laughing," a Latin American diplomat told BuzzFeed News.

"It is not laughing at a good joke, but a nervous laugh, or a bad joke turned laughable precisely because the guy who tells the joke doesn't realize how bad it is," the diplomat added.

Trump has tried to take credit for the laughter that ensued when he claimed he "has accomplished more than almost any administration in the history of our country."

"Oh it was great," the president said after the surprising UN moment. "Well that was meant to get some laughter, but it was great."

A European diplomat noted to BuzzFeed that the braggadocious comment appeared out of place.

"What would resonate well at a political rally in America sounded a little awkward at the UN General Assembly," the diplomat said.

"His words in the opening part of the speech were clearly addressed to [a] domestic audience,” they wrote. “But as he did it in the Trumpian way (bragging ridiculously about being one of the best administrations in history) people in the audience reacted how they reacted.”

You can re-watch the moment below: